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Chen X, Liang XM, Zheng J, Dong YH. Stromal cell-derived factor-1α regulates chondrogenic differentiation via activation of the Wnt/β-catenin pathway in mesenchymal stem cells. World J Stem Cells 2023; 15:490-501. [PMID: 37342217 PMCID: PMC10277961 DOI: 10.4252/wjsc.v15.i5.490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 01/21/2023] [Accepted: 04/13/2023] [Indexed: 05/26/2023] Open
Abstract
BACKGROUND Mesenchymal stem cells (MSCs) have been applied to treat degenerative articular diseases, and stromal cell-derived factor-1α (SDF-1α) may enhance their therapeutic efficacy. However, the regulatory effects of SDF-1α on cartilage differentiation remain largely unknown. Identifying the specific regulatory effects of SDF-1α on MSCs will provide a useful target for the treatment of degenerative articular diseases.
AIM To explore the role and mechanism of SDF-1α in cartilage differentiation of MSCs and primary chondrocytes.
METHODS The expression level of C-X-C chemokine receptor 4 (CXCR4) in MSCs was assessed by immunofluorescence. MSCs treated with SDF-1α were stained for alkaline phosphatase (ALP) and with Alcian blue to observe differentiation. Western blot analysis was used to examine the expression of SRY-box transcription factor 9, aggrecan, collagen II, runt-related transcription factor 2, collagen X, and matrix metalloproteinase (MMP)13 in untreated MSCs, of aggrecan, collagen II, collagen X, and MMP13 in SDF-1α-treated primary chondrocytes, of glycogen synthase kinase 3β (GSK3β) p-GSK3β and β-catenin expression in SDF-1α-treated MSCs, and of aggrecan, collagen X, and MMP13 in SDF-1α-treated MSCs in the presence or absence of ICG-001 (SDF-1α inhibitor).
RESULTS Immunofluorescence showed CXCR4 expression in the membranes of MSCs. ALP stain was intensified in MSCs treated with SDF-1α for 14 d. The SDF-1α treatment promoted expression of collagen X and MMP13 during cartilage differentiation, whereas it had no effect on the expression of collagen II or aggrecan nor on the formation of cartilage matrix in MSCs. Further, those SDF-1α-mediated effects on MSCs were validated in primary chondrocytes. SDF-1α promoted the expression of p-GSK3β and β-catenin in MSCs. And, finally, inhibition of this pathway by ICG-001 (5 µmol/L) neutralized the SDF-1α-mediated up-regulation of collagen X and MMP13 expression in MSCs.
CONCLUSION SDF-1α may promote hypertrophic cartilage differentiation in MSCs by activating the Wnt/β-catenin pathway. These findings provide further evidence for the use of MSCs and SDF-1α in the treatment of cartilage degeneration and osteoarthritis.
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Affiliation(s)
- Xiao Chen
- Department of Orthopedics, Henan Provincial People’s Hospital, Zhengzhou University People’s Hospital, Zhengzhou 450003, Henan Province, China
| | - Xia-Ming Liang
- Department of Orthopedics, Henan Provincial People’s Hospital, Zhengzhou University People’s Hospital, Zhengzhou 450003, Henan Province, China
| | - Jia Zheng
- Department of Orthopedics, Henan Provincial People’s Hospital, Zhengzhou University People’s Hospital, Zhengzhou 450003, Henan Province, China
| | - Yong-Hui Dong
- Department of Orthopedics, Henan Provincial People’s Hospital, Zhengzhou University People’s Hospital, Zhengzhou 450003, Henan Province, China
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Meng Z, Xin L, Fan B. SDF-1α promotes subchondral bone sclerosis and aggravates osteoarthritis by regulating the proliferation and osteogenic differentiation of bone marrow mesenchymal stem cells. BMC Musculoskelet Disord 2023; 24:275. [PMID: 37038152 PMCID: PMC10088262 DOI: 10.1186/s12891-023-06366-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 03/24/2023] [Indexed: 04/12/2023] Open
Abstract
BACKGROUND Subchondral bone sclerosis is a major feature of osteoarthritis (OA), and bone marrow mesenchymal stem cells (BMSCs) are presumed to play an important role in subchondral bone sclerosis. Accumulating evidence has shown that stromal cell-derived factor-1α (SDF-1α) plays a key role in bone metabolism-related diseases, but its role in OA pathogenesis remains largely unknown. The purpose of this study was to explore the role of SDF-1α expressed on BMSCs in subchondral bone sclerosis in an OA model. METHODS In the present study, C57BL/6J mice were divided into the following three groups: the sham control, destabilization of the medial meniscus (DMM), and AMD3100-treated DMM (DMM + AMD3100) groups. The mice were sacrificed after 2 or 8 weeks, and samples were collected for histological and immunohistochemical analyses. OA severity was assessed by performing hematoxylin and eosin (HE) and safranin O-fast green staining. SDF-1α expression in the OA model was measured using an enzyme-linked immunosorbent assay (ELISA), quantitative real-time polymerase chain reaction (q-PCR), and immunohistochemistry. Micro-CT was used to observe changes in subchondral bone in the OA model. CD44, CD90, RUNX2, and OCN expression in subchondral bone were measured using q-PCR and immunohistochemistry. In vitro, BMSCs were transfected with a recombinant lentivirus expressing SDF-1α, an empty vector (EV), or siRNA-SDF-1α. Western blot analysis, q-PCR, and immunofluorescence staining were used to confirm the successful transfection of BMSCs. The effect of SDF-1α on BMSC proliferation was evaluated by performing a CCK-8 assay and cell cycle analysis. The effect of SDF-1α on the osteogenic differentiation of BMSCs was assessed by performing alkaline phosphatase (ALP) and alizarin red S (ARS) staining. Cyclin D1, RUNX2 and OCN expression were measured using Western blot analysis, q-PCR, and immunofluorescence staining. RESULTS SDF-1α expression in the DMM-induced OA model increased. In the DMM + AMD3100 group, subchondral bone sclerosis was alleviated, OA was effectively relieved, and CD44, CD90, RUNX2, and OCN expression in subchondral bone was decreased. In vitro, high levels of SDF-1α promoted BMSC proliferation and increased osteogenic differentiation. Cyclin D1, RUNX2, and OCN expression increased. CONCLUSION The results of this study reveal a new molecular mechanism underlying the pathogenesis of OA. The targeted regulation of SDF-1α may be clinically effective in suppressing OA progression.
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Affiliation(s)
- Zhiqiang Meng
- Jiaozuo Coal Industry (Group) Co. Ltd, Central Hospital, No. 1 Jiankang Road, Jiefang District, Jiaozuo, 454000, Henan, China
- General Hospital of Ningxia Medical University, Ningxia Medical University, Ningxia, China
| | - Lujun Xin
- Jiaozuo Coal Industry (Group) Co. Ltd, Central Hospital, No. 1 Jiankang Road, Jiefang District, Jiaozuo, 454000, Henan, China
| | - Bosheng Fan
- Jiaozuo Coal Industry (Group) Co. Ltd, Central Hospital, No. 1 Jiankang Road, Jiefang District, Jiaozuo, 454000, Henan, China.
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Zhao W, Zhang J, Liao J, Li X. Evaluation of circulating endothelial progenitor cells and the severity of transient ischemic attack. J Clin Neurosci 2022; 99:123-129. [PMID: 35279584 DOI: 10.1016/j.jocn.2022.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 02/08/2022] [Accepted: 03/01/2022] [Indexed: 10/18/2022]
Abstract
OBJECTIVE Endothelial progenitor cells (EPCs) are believed to have a positive effect on maintaining endothelial integrity and participate in angiogenesis after cerebral infarction. Numerous studies have demonstrated that EPCs promote ischemic tissue angiogenesis after stroke. However, there are few studies on the relationship between the level of EPCs and the severity of transient ischemic attacks (TIAs). The current study aimed to investigate the evaluation value of EPCs and serum stromal cell-derived factor-1α(SDF-1α) levels on the severity of TIA. METHODS A total of 144 patients with TIA who had an onset of symptoms within 24 h were enrolled and divided into a high-risk TIA (HR-TIA) group (79 cases) and a nonhigh-risk TIA (NHR-TIA) group (65 cases). Clinical data of these patients were collected. Flow cytometry (FCM) was used to measure the number of CD34+KDR+ EPCs, and enzyme-linked immunosorbent assay (ELISA) was used to determine the concentration of serum SDF-1α and vascular endothelial growth factor (VEGF). Fifteen healthy donors were selected as the normal control (NC) group. Circulating EPCs were isolated by density gradient centrifugation from the first 15 patients in the high-risk TIA group, the nonhigh-risk TIA group, and the NC group. A colony assay and MTT assay were used to determine the proliferation ability of each group, and a Boyden chamber was used to determine the migration potential of EPCs. RESULTS Compared with the nonhigh-risk group, patients in the high-risk TIA group were older and had a higher incidence of hypertension and diabetes and stroke recurrence. Patients in the high-risk TIA group had higher levels of triglycerides, cholesterol, and low-density lipoprotein. However, there were no significant differences between the two groups in sex, time from onset to blood draw, smoking, body mass index, or homocysteine (P > 0.05). The number of circulating EPCs in the nonhigh-risk TIA group was higher than that in the high-risk TIA group (P < 0.01). SDF-1α and VEGF levels in the nonhigh-risk TIA group were lower than those in the high-risk TIA group (P < 0.01). The results of multivariate regression analysis showed that age, hypertension, diabetes, smoking, and SDF-1α were risk factors for high-risk TIA, and EPCs were protective factors for high-risk TIA. EPCs were separated and cultured for 72 h. Compared with the NC group, EPCs functions were weakened in the high-risk TIA group and nonhigh-risk TIA group (P < 0.05). Compared with the nonhigh-risk TIA group, EPC functions were decreased in the high-risk TIA group (P < 0.01). CONCLUSION CD34+KDR+ EPCs are protective factors for high-risk TIA. The number of circulating CD34+KDR+ EPCs and the concentration of SDF-1α have important clinical value in predicting the progression of TIA to high-risk TIA.
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Affiliation(s)
- Wang Zhao
- Department of Neurology, Yongchuan Hospital of Chongqing Medical University, Chongqing 402160, China
| | - Jiangwei Zhang
- Department of Neurology, Yongchuan Hospital of Chongqing Medical University, Chongqing 402160, China.
| | - Juan Liao
- Central Laboratory, Yongchuan Hospital of Chongqing Medical University, Chongqing Key Laboratory of Cerebrovascular Disease Research, Chongqing 402160, China
| | - Xiaoyan Li
- Department of Radiology, Yongchuan Hospital of Chongqing Medical University, Chongqing, 402160, China
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Cotoia A, Cela O, Palumbo G, Altamura S, Marchese F, Mangialetto N, La Bella D, Lizzi V, Capitanio N, Cinnella G. High mobilization of CD133+/CD34+ cells expressing HIF-1α and SDF-1α in septic abdominal surgical patients. BMC Anesthesiol 2020; 20:158. [PMID: 32593288 DOI: 10.1186/s12871-020-01068-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 06/09/2020] [Indexed: 12/25/2022] Open
Abstract
Background The control of endothelial progenitor cells (CD133+/CD34+ EPCs) migrating from bone marrow to peripheral blood is not completely understood. Emerging evidence suggests that stromal cell-derived factor-1α (SDF-1α) mediates egression of EPCs from bone marrow, while the hypoxia inducible factor (HIF) transcriptional system regulates SDF-1α expression. Our study aimed to investigate the time course of circulating CD133+/CD34+ EPCs and its correlation with the expression of HIF-1α protein and SDF-1α in postoperative laparoscopic abdominal septic patients. Methods Postoperative patients were divided in control (C group) and septic group (S group) operated immediately after the diagnosis of sepsis/septic shock. Blood samples were collected at baseline (0), 1, 3 and 7 postoperative days for CD133+/CD34+ EPCs count expressing or not the HIF-1α and SDF-1α analysis. Results Thirty-two patients in S group and 39 in C group were analyzed. In C group CD133+/CD34+ EPCs count remained stable throughout the study period, increasing on day 7 (173 [0–421] /μl vs baseline: P = 0.04; vs day 1: P = 0.002). In S group CD133+/CD34+ EPCs count levels were higher on day 3 (vs day 1: P = 0.006 and day 7: P = 0.026). HIF-1α expressing CD133+/CD34+ EPCs count decreased on day 1 as compared with the other days in C group (day 0 vs 1: P = 0.003, days 3 and 7 vs 1: P = 0.008), while it was 321 [0–1418] /μl on day 3 (vs day 1; P = 0.004), and 400 [0–587] /μl on day 7 in S group. SDF-1α levels were higher not only on baseline but also on postoperative day 1 in S vs C group (219 [124–337] pg/ml vs 35 [27–325] pg/ml, respectively; P = 0.01). Conclusion Our results indicate that sepsis in abdominal laparoscopic patients might constitute an additional trigger of the EPCs mobilization as compared with non-septic surgical patients. A larger mobilization of CD133+/CD34+ EPCs, preceded by enhanced plasmatic SDF-1α, occurs in septic surgical patients regardless of HIF-1α expression therein. Trial registration ClinicalTrials.gov no. NCT02589535. Registered 28 October 2015.
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Teo JY, Ko E, Leong J, Hong J, Jeon JS, Yang YY, Kong H. Surface tethering of stromal cell-derived factor-1α carriers to stem cells enhances cell homing to ischemic muscle. Nanomedicine 2020; 28:102215. [PMID: 32438106 DOI: 10.1016/j.nano.2020.102215] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 02/28/2020] [Accepted: 04/27/2020] [Indexed: 12/13/2022]
Abstract
Mesenchymal stem cells are promising medicine for treating diseases and tissue defects because of their innate ability to secrete therapeutic factors. Intravenous delivery of stem cells, although favored for its minimal invasiveness, is often plagued by low cellular engraftment in the target tissue. To this end, this study hypothesizes that in situ activation of cellular expression of CXC chemokine 4 (CXCR4) would significantly improve cellular migration to injured tissue. This hypothesis was examined by tethering the surface of stem cells with poly(D,L-lactide-co-glycolide)-block-hyaluronic acid (HA) particles containing stromal cell-derived factor-1α, a model chemokine to sensitize CXCR4. The HA blocks in the particles enhanced the association rate constant to stem cells by 3.3-fold, and in turn, increased the number of cells expressing CXCR4 receptors. Consequently, these cells displayed 1.2-fold higher transendothelial migration in vitro and 1.7-fold greater trafficking to the ischemic hindlimb of a mouse than that of the untethered cells.
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Affiliation(s)
- Jye Yng Teo
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA; Institute of Bioengineering and Nanotechnology, Singapore, Singapore
| | - Eunkyung Ko
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Jiayu Leong
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA; Institute of Bioengineering and Nanotechnology, Singapore, Singapore
| | - Jiman Hong
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea
| | - Jessie S Jeon
- KAIST Institute for Health Science and Technology, Daejeon, South Korea
| | - Yi Yan Yang
- Institute of Bioengineering and Nanotechnology, Singapore, Singapore
| | - Hyunjoon Kong
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA; Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA; Department of Pathobiology, University of Illinois at Urbana-Champaign, Urbana, IL, USA; Carle Illinois College of Medicine, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
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Uematsu M, Nakamura T, Yoshizaki T, Watanabe Y, Deyama J, Watanabe K, Kobayashi T, Fujioka D, Saito Y, Nakamura K, Kawabata K, Obata JE, Kugiyama K. High levels of stromal cell-derived factor-1α predict short-term progression of renal dysfunction in patients with coronary artery disease. Clin Exp Nephrol 2019; 23:920-927. [PMID: 30830550 DOI: 10.1007/s10157-019-01722-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 02/25/2019] [Indexed: 11/30/2022]
Abstract
BACKGROUND Stromal cell-derived factor-1α (SDF-1α) is an inflammatory chemokine that plays a critical role in cardiovascular disease. Although persistent inflammation causes renal dysfunction, it remains unclear whether SDF-1α is related to progression of chronic kidney disease. This study examined whether high levels of SDF-1α are associated with future declines in renal function in patients with coronary artery disease (CAD). METHODS Plasma levels of SDF-1α in the peripheral blood were measured by enzyme-linked immunosorbent assay in 344 patients with CAD. All patients were followed for 24 months or until the occurrence of renal dysfunction, defined as ≥ 25% decrease in estimated glomerular filtration rate (eGFR) from baseline. RESULTS During the follow-up period, 36 patients developed renal dysfunction. Multivariate logistic regression analysis showed that high plasma levels of SDF-1α were significantly associated with progression of renal dysfunction (odds ratio 1.65; 95% confidence intervals 1.07-2.35, p = 0.03). In addition, high plasma levels of SDF-1α had a significant incremental effect on the predictive value of known risk factors for renal dysfunction in analyses using net reclassification improvement (NRI) and integrated discrimination improvement (IDI) (NRI 0.58 [0.07-1.02], p < 0.01; and IDI 0.030 [0.001-0.085], p = 0.02). CONCLUSION High plasma levels of SDF-1α were associated with the short-term decline of eGFR in patients with CAD. Thus, SDF-1α may be useful for predicting the progression of renal dysfunction in patients with CAD.
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Affiliation(s)
- Manabu Uematsu
- Department of Internal Medicine II, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, 409-3898, Japan.
| | - Takamitsu Nakamura
- Department of Internal Medicine II, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, 409-3898, Japan
| | - Toru Yoshizaki
- Department of Internal Medicine II, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, 409-3898, Japan
| | - Yosuke Watanabe
- Department of Internal Medicine II, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, 409-3898, Japan
| | - Juntaro Deyama
- Department of Internal Medicine II, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, 409-3898, Japan
| | - Kazuhiro Watanabe
- Department of Internal Medicine II, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, 409-3898, Japan
| | - Tsuyoshi Kobayashi
- Department of Internal Medicine II, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, 409-3898, Japan
| | - Daisuke Fujioka
- Department of Internal Medicine II, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, 409-3898, Japan
| | - Yukio Saito
- Department of Internal Medicine II, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, 409-3898, Japan
| | - Kazuto Nakamura
- Department of Internal Medicine II, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, 409-3898, Japan
| | - Kenichi Kawabata
- Department of Internal Medicine II, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, 409-3898, Japan
| | - Jun-Ei Obata
- Department of Internal Medicine II, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, 409-3898, Japan
| | - Kiyotaka Kugiyama
- Department of Internal Medicine II, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, 409-3898, Japan
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Huang X, Wan M, Yang Q, Ding X, Zhou Z. The stromal cell-derived factor-1 α (SDF-1α)/cysteine-X-cysteine chemokine receptor 4 (CXCR4) axis: a possible prognostic indicator of acute ischemic stroke. J Int Med Res 2019; 47:1897-1907. [PMID: 30760134 PMCID: PMC6567759 DOI: 10.1177/0300060519827173] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Objective The stromal cell-derived factor-1α/cysteine-X-cysteine chemokine receptor 4 (SDF-1α/CXCR4) axis promotes neuroprotection and angiogenesis in animal studies. Few studies have investigated the potential clinical implications of the SDF-1α/CXCR4 axis in patients with acute ischemic stroke (AIS). We evaluated the prognostic values of the SDF-1α/CXCR4 axis in patients with proximal middle cerebral artery occlusion. Methods Fifty-five patients and 18 age- and sex-matched volunteers were enrolled. Baseline clinical characteristics and risk factors of stroke were recorded. Peripheral whole blood cells were double stained with anti-CD34 and anti-CXCR4 (CD184). CD34+CXCR4+ cells were analyzed by flow cytometry. Plasma SDF-1α levels were measured by enzyme-linked immunosorbent assay. Results In the AIS group, plasma SDF-1α levels and the number of circulating CD34+CXCR4+ cells were significantly higher than those in controls. Day 1 SDF-1α levels were negatively correlated with infarct volume (r = −0.521) and the initial National Institutes of Health Stroke Scale score (r = −0.489). SDF-1α levels (day 1: r = −0.514; day 3: r = −0.275; day 7: r = −0.375) and circulating CD34+CXCR4+ cells (day 7: r = −0.282) were inversely associated with the 90-day modified Rankin Scale score. Conclusion The SDF-1α/CXCR4 axis has potential applications for predicting the clinical outcome of AIS.
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Affiliation(s)
- Xianjun Huang
- 1 Department of Neurology, Yijishan Hospital, Wannan Medical College, Wuhu, Anhui Province, China
| | - Mei Wan
- 2 Department of Neurology, Huangshi Central Hospital, Affiliated Hospital of Hubei Polytechnic University, Huangshi, Hubei Province, China
| | - Qian Yang
- 1 Department of Neurology, Yijishan Hospital, Wannan Medical College, Wuhu, Anhui Province, China
| | - Xianhui Ding
- 1 Department of Neurology, Yijishan Hospital, Wannan Medical College, Wuhu, Anhui Province, China
| | - Zhiming Zhou
- 1 Department of Neurology, Yijishan Hospital, Wannan Medical College, Wuhu, Anhui Province, China
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Zhang H, Yu S, Zhao X, Mao Z, Gao C. Stromal cell-derived factor-1α-encapsulated albumin/heparin nanoparticles for induced stem cell migration and intervertebral disc regeneration in vivo. Acta Biomater 2018; 72:217-227. [PMID: 29597025 DOI: 10.1016/j.actbio.2018.03.032] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 02/13/2018] [Accepted: 03/16/2018] [Indexed: 12/30/2022]
Abstract
Intervertebral disc (IVD) degeneration may cause many diseases and pain. Stem cell migration toward the site of IVD degeneration is a key factor for IVD regeneration. In the current study, we prepared albumin/heparin nanoparticles (BHNPs) as injectable carriers of stromal cell-derived factor-1α (SDF-1α, also known as C-X-C motif chemokine 12), a powerful chemoattractant for the homing of bone marrow resident mesenchymal stem cells (MSCs), for protection of the molecule against degradation for a sustained release. The NPs have relatively uniform small size, with a diameter of about 110 nm. The NPs possess a high loading capacity of SDF-1α with a sustained release profile. The bioactivity of the obtained BHNPs/SDF was then studied in vitro and in vivo. The BHNPs/SDF can induce migration of MSCs in a dose-dependent manner in vitro. After injected into the damaged disc, BHNPs/SDF induce much better regeneration of annulus fibrosus and nucleus pulposus, compared to SDF-1α and BHNPs alone, evidenced with better histological grade scores and higher expression of SOX9, Aggrecan, and Collagen type II at the level of both mRNA and protein. This study provides a simple nanoplatform to load SDF-1α and protect it against degradation, with potential application in inductive tissue regeneration in vivo. STATEMENT OF SIGNIFICANCE Stem cell migration toward the site of IVD degeneration is a key event to promote IVD regeneration. In the current study, we prepared albumin/heparin nanoparticles (BHNPs) as injectable carriers to protect SDF-1α against degradation and for the sustained release of the molecule. After injected into the damaged disc, BHNPs/SDF induced much better regeneration of IVD, compared to SDF-1α and BHNPs alone. This study provides a simple nanoplatform to load SDF-1α and protect it from degradation, with potential application in inductive tissue regeneration in vivo.
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Neufurth M, Wang X, Wang S, Steffen R, Ackermann M, Haep ND, Schröder HC, Müller WEG. 3D printing of hybrid biomaterials for bone tissue engineering: Calcium-polyphosphate microparticles encapsulated by polycaprolactone. Acta Biomater 2017; 64:377-88. [PMID: 28966095 DOI: 10.1016/j.actbio.2017.09.031] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 08/18/2017] [Accepted: 09/22/2017] [Indexed: 01/08/2023]
Abstract
Here we describe the formulation of a morphogenetically active bio-ink consisting of amorphous microparticles (MP) prepared from Ca2+ and the physiological inorganic polymer, polyphosphate (polyP). Those MP had been fortified by mixing with poly-ε-caprolactone (PCL) to allow 3D-bioprinting. The resulting granular PCL/Ca-polyP-MP hybrid material, liquefied by short-time heating to 100 °C, was used for the 3D-printing of tissue-like scaffolds formed by strands with a thickness of 400 µm and a stacked architecture leaving ≈0.5 mm2-sized open holes enabling cell migration. The printed composite scaffold turned out to combine suitable biomechanical properties (Young's modulus of 1.60 ± 0.1 GPa; Martens hardness of 153 ± 28 MPa), matching those of cortical and trabecular bone, with morphogenetic activity. This scaffold was capable of attracting and promoting the growth of human bone-related SaOS-2 cells as demonstrated by staining for cell viability (Calcein AM), cell density (DRAQ5) and SEM studies. Furthermore, the hybrid material was demonstrated to upregulate the steady-state-expression of the cell migration-inducing chemokine SDF-1α. EDX analysis and FTIR measurements revealed the presence of hydroxyapatite in the mineral deposits formed on the scaffold surface. Based on the results we conclude that granular PCL/Ca-polyP-MP hybrid material is suitable for the fabrication of bioprintable scaffold which comprises not only biomechanical stability but also morphogenetic potential. STATEMENT OF SIGNIFICANCE In present-day regenerative engineering efforts, biomaterial- and cell-based strategies are proposed that meet the required functional and spatial characteristics and variations, especially in the transition regions between soft (cartilage, tendon or ligament) and hard (bone) tissues. In a biomimetic approach we succeeded to fabricate amorphous Ca-polyP nanoparticles/microparticles which are highly biocompatible. Together with polycaprolactone (PCL), polyP can be bio-printed. This hybrid material attracts the cells, as documented optically as well as by a gene-expression studies. Since PCL is already a FDA-approved organic and inert polymer and polyP a physiological biologically active component this new bio-hybrid material has the potential to restore physiological functions, including bone remodelling and regeneration if used as implant.
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Wu G, Feng C, Quan J, Wang Z, Wei W, Zang S, Kang S, Hui G, Chen X, Wang Q. In situ controlled release of stromal cell-derived factor-1α and antimiR-138 for on-demand cranial bone regeneration. Carbohydr Polym 2017; 182:215-224. [PMID: 29279118 DOI: 10.1016/j.carbpol.2017.10.090] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Revised: 10/10/2017] [Accepted: 10/26/2017] [Indexed: 12/20/2022]
Abstract
Bone regeneration involves complex physiological processes, which is generally regulated and controlled by multiple bioactive molecules. In situ controlled release of combined bioactive factors in a spatiotemporal sequence for adapting the demand of bone regeneration is a desired strategy. In this study, nanoparticle/hydrogel composite system was constructed by incorporating stromal cell derived factor-1α (SDF-1α) and chitosan/tripolyphosphate/hyaluronic acid/antimiRNA-138 nanoparticles (CTH/antimiR-138 NPs) in chitosan/β-sodium glycerol phosphate (CS/GP) hydrogel for rat critical-size calvarial bone regeneration. The fast release of SDF-1α promoted the migration of mesenchymal stem cells (MSCs) for 6 d, while the sustained release of antimiR-138 from the nanoparticle/hydrogel compound enhanced the osteogenic differentiation of MSCs over 21 d. 8 weeks after surgery, calvarial specimens were evaluated by microcomputed tomography (μ-CT), histological analysis and immunohistochemistry. Comparing with blank group and hydrogel group, hydrogels incorporated with SDF-1α and/or CTH/antimiR-138 NPs significantly enhanced bone regeneration (p<0.05). In addition, the expression of collagen type-1 (COL-1), osteopontin (OPN) and osteocalcin (OCN) proteins were enhanced in the combined drug group (incorporated both SDF-1α and CTH/antimiR-138 NPs) in comparison to the hydrogel group. Our research indicated the in situ formation of NPs/hydrogel composite could provide temporal sequence-release of SDF-1α and CTH/antimiR-138 NPs for on-demand MSCs homing and cranial bone regeneration.
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Affiliation(s)
- Guangsheng Wu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Periodontology, School of Stomatology, The Fourth Military Medical University, No. 145 West Changle Road, Xi'an 710032, China; Navy Qingdao First Sanatorium of PLA, No. 27 West Hong Kong Road, Qingdao, 266071, Shandong Province, China; College of Marine Life Science, Ocean University of China, No. 5 Yushan Road, Qingdao, 266003, Shandong Province, China
| | - Chao Feng
- College of Marine Life Science, Ocean University of China, No. 5 Yushan Road, Qingdao, 266003, Shandong Province, China
| | - Jingjing Quan
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University and Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, China
| | - Zhongshan Wang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, No. 145 West Changle Road, Xi'an 710032, China
| | - Wei Wei
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Periodontology, School of Stomatology, The Fourth Military Medical University, No. 145 West Changle Road, Xi'an 710032, China
| | - Shengqi Zang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Periodontology, School of Stomatology, The Fourth Military Medical University, No. 145 West Changle Road, Xi'an 710032, China
| | - Shuai Kang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Periodontology, School of Stomatology, The Fourth Military Medical University, No. 145 West Changle Road, Xi'an 710032, China
| | - Guangyan Hui
- Navy Qingdao First Sanatorium of PLA, No. 27 West Hong Kong Road, Qingdao, 266071, Shandong Province, China
| | - Xiguang Chen
- College of Marine Life Science, Ocean University of China, No. 5 Yushan Road, Qingdao, 266003, Shandong Province, China.
| | - Qintao Wang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Periodontology, School of Stomatology, The Fourth Military Medical University, No. 145 West Changle Road, Xi'an 710032, China.
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11
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Kim JS, Jang Y, Kim JH, Park YH, Hwang SA, Kim J, Lee SR, Xu Z, Ban C, Ahn K, Chun KJ. Cardioprotective Effect of the SDF-1α/CXCR4 Axis in Ischemic Postconditioning in Isolated Rat Hearts. Korean Circ J 2017; 47:949-959. [PMID: 29035436 PMCID: PMC5711687 DOI: 10.4070/kcj.2016.0353] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 11/29/2016] [Accepted: 08/06/2017] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Information about the role of the stromal cell-derived factor-1α (SDF-1α)/chemokine receptor type 4 (CXCR4) axis in ischemic postconditioning (IPOC) is currently limited. We hypothesized that the SDF-1α/CXCR4 signaling pathway is directly involved in the cardioprotective effect of IPOC. METHODS Isolated rat hearts were divided into four groups. The control group was subjected to 30-min of regional ischemia and 2-hour of reperfusion (n=12). The IPOC group was induced with 6 cycles of 10-second reperfusion and 10-second global ischemia (n=8) in each cycle. The CXCR4 antagonist, AMD3100, was applied before reperfusion in the IPOC group (AMD+IPOC group, n=11) and control group (AMD group, n=9). Hemodynamic changes with electrocardiography were monitored and infarct size was measured. The SDF-1α, lactate dehydrogenase (LDH) and creatine kinase (CK) concentrations in perfusate were measured. We also analyzed extracellular signal-regulated kinase 1/2 (ERK1/2) and Akt phosphorylation state expression. RESULTS IPOC significantly reduced infarct size, but AMD3100 attenuated the infarct reducing effect of IPOC. IPOC significantly decreased LDH and CK, but these effects were reversed by AMD3100. ERK1/2 and Akt phosphorylation increased with IPOC and these effects were blocked by AMD3100. CONCLUSION Based on the results of this study, SDF-1α/CXCR4 signaling may be involved in IPOC cardioprotection and this signaling pathway couples to the ERK1/2 and Akt pathways.
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Affiliation(s)
- Jeong Su Kim
- Cardiovascular Research Institute, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Youngho Jang
- Cardiovascular Research Institute, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - June Hong Kim
- Cardiovascular Research Institute, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Yong Hyun Park
- Cardiovascular Research Institute, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Sun Ae Hwang
- Cardiovascular Research Institute, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Jun Kim
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Sung Ryul Lee
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, Inje University College of Medicine, Busan, Korea
| | - Zhelong Xu
- Department of Anesthesiology, University of North Carolina, Chapel Hill, NC, USA
| | - Changill Ban
- Department of Chemistry, Pohang University of Science and Technology, Pohang, Korea
| | - Kyohan Ahn
- Department of Chemistry, Pohang University of Science and Technology, Pohang, Korea
| | - Kook Jin Chun
- Cardiovascular Research Institute, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea.
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Wang Y, Chen J, Fan W, Zhang J, Hua B, Sun B, Zhu L, Niu X, Yan Z, Guo C. Stromal cell-derived factor-1α and transforming growth factor-β 1 synergistically facilitate migration and chondrogenesis of synovium-derived stem cells through MAPK pathways. Am J Transl Res 2017; 9:2656-2667. [PMID: 28560013 PMCID: PMC5446545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 05/01/2017] [Indexed: 06/07/2023]
Abstract
The clinical translation of tissue engineering methods is confined by the limited external cell sources, which is hopefully to be addressed by the cell guidance approach as cytokine-induced homing and differentiation of the patients' autologous cells. Synovium-derived stem cells (SDSCs) are a potent cell source for cartilage restoration due to its intrinsic proximity and tissue-specific chondrogenic capacity. In this study, stromal cell-derived factor-1α (SDF-1α) in combination with transforming growth factor β1 (TGF-β1) were used to induce SDSCs migration and chondrogenesis in vitro. The migration capacity was evaluated by transwell assay and for chondrogenic evaluation, the expression of Sox9, ACAN and COL2A1 were assessed by quantitative RT-PCR while the expression of sulfated GAG and collagen II were evaluated by Alcian Blue stain and immunohistochemistry respectively. Our data showed that SDF-1α/CXC chemokine receptor 4 (CXCR4) was involved in SDSCs migration through phosphoinositide 3-kinase (PI3K)/protein kinase B (Akt) pathway. Exogenous TGF-β1 enhanced SDF-1α-induced SDSCs migration in a concentration and time-dependent manner through CXCR4, evidenced as complete blockage by AMD3100, the CXCR4 antagonist and this effect was mediated by extracellular regulated protein kinases (ERK) activation. Moreover, the addition of SDF-1α augmented the TGF-β1-induced SDSCs chondrogenesis, evidenced by the increased pellet sizes and the expressions of COL 2A1, ACAN and Sox9. This effect was related to c-Jun N-terminal kinase (JNK) activation. Collectively, these results suggest that SDF-1α and TGF-β1 interacts with each other and synergistically enhance the SDSCs migration and chondrogenesis through MAPK pathways.
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Affiliation(s)
- Yiming Wang
- Department of Orthopedics, Zhongshan Hospital, Fudan UniversityShanghai, China
| | - Jifei Chen
- Department of Orthopedics, Zhongshan Hospital, Fudan UniversityShanghai, China
| | - Wenshuai Fan
- Department of Orthopedics, Zhongshan Hospital, Fudan UniversityShanghai, China
| | - Jing Zhang
- Department of Orthopedics, Zhongshan Hospital, Fudan UniversityShanghai, China
| | - Bingxuan Hua
- Department of Orthopedics, Zhongshan Hospital, Fudan UniversityShanghai, China
| | - Bolin Sun
- Department of Orthopedics, Zhongshan Hospital, Fudan UniversityShanghai, China
| | - Liang Zhu
- Department of Orthopedics, Zhongshan Hospital, Fudan UniversityShanghai, China
| | - Xinhao Niu
- Department of Orthopedics, Zhongshan Hospital, Fudan UniversityShanghai, China
| | - Zuoqin Yan
- Department of Orthopedics, Zhongshan Hospital, Fudan UniversityShanghai, China
| | - Changan Guo
- Department of Orthopedics, Zhongshan Hospital, Fudan UniversityShanghai, China
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Eby JM, Abdelkarim H, Albee LJ, Tripathi A, Gao X, Volkman BF, Gaponenko V, Majetschak M. Functional and structural consequences of chemokine (C-X-C motif) receptor 4 activation with cognate and non-cognate agonists. Mol Cell Biochem 2017; 434:143-51. [PMID: 28455789 DOI: 10.1007/s11010-017-3044-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 04/22/2017] [Indexed: 01/27/2023]
Abstract
Chemokine (C-X-C motif) receptor 4 (CXCR4) regulates cell trafficking and plays important roles in the immune system. Ubiquitin has recently been identified as an endogenous non-cognate agonist of CXCR4, which activates CXCR4 via interaction sites that are distinct from those of the cognate agonist C-X-C motif chemokine ligand 12 (CXCL12). As compared with CXCL12, chemotactic activities of ubiquitin in primary human cells are poorly characterized. Furthermore, evidence for functional selectivity of CXCR4 agonists is lacking, and structural consequences of ubiquitin binding to CXCR4 are unknown. Here, we show that ubiquitin and CXCL12 have comparable chemotactic activities in normal human peripheral blood mononuclear cells, monocytes, vascular smooth muscle, and endothelial cells. Chemotactic activities of the CXCR4 ligands could be inhibited with the selective CXCR4 antagonist AMD3100 and with a peptide analogue of the second transmembrane domain of CXCR4. In human monocytes, ubiquitin- and CXCL12-induced chemotaxis could be inhibited with pertussis toxin and with inhibitors of phospholipase C, phosphatidylinositol 3 kinase, and extracellular signal-regulated kinase 1/2. Both agonists induced inositol trisphosphate production in vascular smooth muscle cells, which could be inhibited with AMD3100. In β-arrestin recruitment assays, ubiquitin did not sufficiently recruit β-arrestin2 to CXCR4 (EC50 > 10 μM), whereas the EC50 for CXCL12 was 4.6 nM (95% confidence interval 3.1-6.1 nM). Both agonists induced similar chemical shift changes in the 13C-1H-heteronuclear single quantum correlation (HSQC) spectrum of CXCR4 in membranes, whereas CXCL11 did not significantly alter the 13C-1H-HSQC spectrum of CXCR4. Our findings point towards ubiquitin as a biased agonist of CXCR4.
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Mi L, Liu H, Gao Y, Miao H, Ruan J. Injectable nanoparticles/hydrogels composite as sustained release system with stromal cell-derived factor-1α for calvarial bone regeneration. Int J Biol Macromol 2017; 101:341-347. [PMID: 28330754 DOI: 10.1016/j.ijbiomac.2017.03.098] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 03/16/2017] [Accepted: 03/17/2017] [Indexed: 01/16/2023]
Abstract
Repair of craniofacial bony defects remains a challenge for surgeons due to the delicate and complex anatomy of the craniofacial skeleton. Stromal cell-derived factor-1α (SDF-1α) is an important chemokine which plays a critical role in the homing of mesenchymal stem cells (MSC), while, the shortcomings including short half-life and easy degradation by enzymes made it in relatively low efficacy. In this work, SDF-1α/chitosan/carboxymeymethy-chitosan nanoparticles (SDF-1α/CS/CMCS NPs) were prepared and characterized for various parameters including morphology, particle size, zeta potential, loading efficiency and the release characteristics from thermosensitive chitosan/β-glycerol phosphate disodium salt (CS/GP) hydrogels. The SDF-1α encapsulated in CS/CMCS NPs within CS/GP hydrogels showed significantly sustained release effect. The cumulative release of SDF-1α was only 40% during 28d. The data from rat calvarial defects model revealed that the SDF-1α/CS/CMCS NPs embedded hydrogels group could significantly promote the new bone formation (38.5±4.5%), compared to that of the SDF-1α embedded hydrogels group (26.3±7.25%, p<0.05) and the control group (8.64±4.8%, p<0.01). Histological data also confirmed this difference. This study demonstrated the potential applications of nanoparticulate injectable hydrogels for sustained release SDF-1α on bone tissue regeneration.
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Affiliation(s)
- Lei Mi
- Department of Preventive Dentisty, The Research Center of Stomatology, Stomatology Hospital, Xi'an Jiaotong University, No. 98 West-Five Road, Xi'an 710004, China; Department of Stomatology, Yulin First Hospital, No. 93 Yuxi Avenue, Yulin, 719000 Shaanxi Province, China
| | - Huaiqin Liu
- Department of Stomatology, Yulin First Hospital, No. 93 Yuxi Avenue, Yulin, 719000 Shaanxi Province, China
| | - Yu Gao
- Department of Stomatology, Yulin First Hospital, No. 93 Yuxi Avenue, Yulin, 719000 Shaanxi Province, China
| | - Hui Miao
- Department of Periodontology, School of Stomatology, Fourth Military Medical University, No. 145 West Changle Road, Xi'an 710032, China
| | - Jianping Ruan
- Department of Preventive Dentisty, The Research Center of Stomatology, Stomatology Hospital, Xi'an Jiaotong University, No. 98 West-Five Road, Xi'an 710004, China.
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Park KS, Kwak S, Cho YM, Park KS, Jang HC, Kim SY, Jung HS. Vildagliptin reduces plasma stromal cell-derived factor-1α in patients with type 2 diabetes compared with glimepiride. J Diabetes Investig 2016; 8:218-226. [PMID: 27575011 PMCID: PMC5334315 DOI: 10.1111/jdi.12572] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 08/03/2016] [Accepted: 08/28/2016] [Indexed: 01/20/2023] Open
Abstract
AIMS/INTRODUCTION Dipeptidyl peptidase-4 inhibitors might have pleiotropic protective effects on cardiovascular disease (CVD), in contrast to sulfonylureas. Therefore, we compared various CVD risk factors between vildagliptin and glimepiride. MATERIALS AND METHODS We carried out a randomized, prospective and crossover trial. A total of 16 patients with type 2 diabetes whose glycated hemoglobin was >7% were randomized to add vildagliptin or glimepiride. After 12-week treatment, each drug was replaced with the other for another 12 weeks. Before and after each treatment, glucose homeostasis and CVD risk factors were assessed, and the continuous glucose monitoring system was applied to calculate glycemic variability. RESULTS The mean age of the participants was 60 years, 31% were men, body mass index 25.5 kg/m2 and HbA1c 8.41%. Both vildagliptin and glimepiride significantly decreased glycated hemoglobin and glycemic variability indices. Despite the improved glucose homeostasis, favorable change of CVD markers was not prominent in both the arms, along with significant weight gain. Only plasma stromal cell-derived factor (SDF)-1α decreased by 30% in the vildagliptin arm. According to regression analyses, the reduction of SDF-1α was independently associated with vildagliptin usage and serum interleukin-6 changes, but white blood cells were not related with the SDF-1α changes. CONCLUSION Compared with glimepiride, vildagliptin arrestingly decreased plasma SDF-1α, and its clinical implications should be further investigated.
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Affiliation(s)
- Kyeong Seon Park
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - SooHeon Kwak
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Young Min Cho
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Kyong Soo Park
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Hak C Jang
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi-do, Korea
| | - Seong Yeon Kim
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Hye Seung Jung
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
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Xie C, Gao X, Luo Y, Pang Y, Li M. Electroacupuncture modulates stromal cell-derived factor-1α expression and mobilization of bone marrow endothelial progenitor cells in focal cerebral ischemia/reperfusion model rats. Brain Res 2016; 1648:119-126. [PMID: 27453543 DOI: 10.1016/j.brainres.2016.07.038] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 05/27/2016] [Accepted: 07/20/2016] [Indexed: 01/07/2023]
Abstract
Stromal cell-derived factor-1α(SDF-1α) plays a crucial role in regulating the mobilization, migration and homing of endothelial progenitor cells(EPCs). Electroacupuncture(EA), a modern version of Traditional Chinese Medicine, can improve neurological recovery and angiogenesis in cerebral ischemic area. This study aimed to investigate the effects of electroacupuncture(EA) on the mobilization and migration of bone marrow EPCs and neurological functional recovery in rats model after focal cerebral ischemia/reperfusion and the potentially involved mechanisms. Sprague-Dawley rats received filament occlusion of the right middle cerebral artery for 2h followed by reperfusion for 12h, 1d, 2d, 3d, 7d respectively. Rats were randomly divided into sham group, model group and EA group. After 2h of the reperfusion, EA was given at the "Baihui" (GV 20)/Siguan ("Hegu" (LI 4)/"Taichong" (LR 3)) acupoints in the EA group. Modified neurological severity score (mNSS) was used to assess the neurological functional recovery. EPCs number and SDF-1α level in bone marrow(BM) and peripheral blood(PB) were detected by using fluorescence-activated cell sorting (FACS) analysis and quantitative real time polymerase chain reaction (qRT-PCR) respectively. An mNSS test showed that EA treatment significantly improved the neurological functional outcome. EPCs number in PB and BM were obviously increased in the EA group. After cerebral ischemia, the SDF-1α level was decreased in BM while it was increased in PB, which implied a gradient of SDF-1α among BM and PB after ischemia. It suggested that the forming of SDF-1α concentration gradient can induce the mobilization and homing of EPCs. Eletroacupuncture as a treatment can accelerate and increase the forming of SDF-1α concentration gradient to further induce the mobilization of EPCs and angiogenesis in ischemic brain and improve the neurological function recovery.
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Affiliation(s)
- Chenchen Xie
- Department of Neurology, the First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, China; Department of Neurology, Affiliated Hospital of Chengdu University, Chengdu, Sichuan 610018, China.
| | - Xiang Gao
- Department of Nephrology, The Eleventh People's Hospital of Chengdu, Chengdu, Sichuan 610018, China.
| | - Yong Luo
- Department of Neurology, the First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, China.
| | - Yueshan Pang
- Department of Neurology, the First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, China.
| | - Man Li
- Department of Neurology, the First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing 400016, China.
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Gao Y, Lu Z, Chen C, Cui X, Liu Y, Zheng T, Jiang X, Zeng C, Quan D, Wang Q. Mesenchymal stem cells and endothelial progenitor cells accelerate intra-aneurysmal tissue organization after treatment with SDF-1α-coated coils. Neurol Res 2016; 38:333-41. [PMID: 27125512 DOI: 10.1080/01616412.2016.1164433] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Recurrences of aneurysms remain the major drawback of detachable coils for the endovascular treatment of intracranial aneurysms. The aim of the present study is to develop new modified coils, coating the surface of platinum coils with silk fibroin (SF) consisting of stromal cell-derived factor-1α (SDF-1α), and evaluate its acceleration of organization of cavities and reduction of lumen size in a rat aneurysm model. The morphological characteristics of SDF-1α-coated coils were examined using scanning electron microscopy (SEM). Fifty experimental aneurysms were created and randomly divided into five groups: three groups were embolized with SDF-1α-coated coils (8 mm) and two of these groups need transplantation of mesenchymal stem cells (MSCs) or endothelial progenitor cells (EPCs); one group was embolized with bare coils (8 mm) and another group severed as control. After coil implantation for 14 or 28 days, the coils were harvested and histological analysis was performed. SEM photographs showed that SF/SDF-1α-coated coils have uniform size and a thin film compared with bare coils. In the group treated with SDF-1α-coated coils, tissue organization was accelerated and the proliferation of α-smooth muscle actin positive cells was promoted in the aneurysmal sac. Compared with unmodified coils, on day 28, tissue organization was significantly greater in the group treated with SDF-1α-coated coils and MSC or EPC transplantation. These results suggest that SDF-1α-coated coils with MSC or EPC transplantation may be beneficial in the aneurysm healing and endothelialization at the orifice of embolized aneurysm.
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Affiliation(s)
- Yuyuan Gao
- a The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital , Southern Medical University , Guangzhou , China.,b Graduate School of Southern Medical University , Guangzhou , China.,c Department of Neurology , Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangdong Neuroscience Institute , Guangzhou , China
| | - Ziming Lu
- a The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital , Southern Medical University , Guangzhou , China.,b Graduate School of Southern Medical University , Guangzhou , China
| | - Chengwei Chen
- a The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital , Southern Medical University , Guangzhou , China.,b Graduate School of Southern Medical University , Guangzhou , China
| | - Xubo Cui
- a The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital , Southern Medical University , Guangzhou , China.,b Graduate School of Southern Medical University , Guangzhou , China
| | - Yaqi Liu
- a The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital , Southern Medical University , Guangzhou , China.,b Graduate School of Southern Medical University , Guangzhou , China
| | - Tao Zheng
- a The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital , Southern Medical University , Guangzhou , China.,b Graduate School of Southern Medical University , Guangzhou , China
| | - Xiaodan Jiang
- a The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital , Southern Medical University , Guangzhou , China
| | - Chi Zeng
- d School of Chemistry and Chemical Engineering , Sun Yat-Sen University , Guangzhou , China
| | - Daping Quan
- d School of Chemistry and Chemical Engineering , Sun Yat-Sen University , Guangzhou , China
| | - Qiujing Wang
- a The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang Hospital , Southern Medical University , Guangzhou , China
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Liu C, Zhu CY, Wang GS, Zhu YM. SDF-1α may be an independent risk factor for lymph node metastasis in gastric cancer. Shijie Huaren Xiaohua Zazhi 2015; 23:1897-1902. [DOI: 10.11569/wcjd.v23.i12.1897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To explore the relationship between the expression of stromal cell-derived factor-1α (SDF-1α) and lymph node metastasis in gastric cancer patients.
METHODS: The expression of SDF-1α in gastric cancer tissues from 152 patients was detected by immunohistochemistry. The correlations of SDF-1α with clinicopathologic features were analyzed.
RESULTS: SDF-1α expression was significantly correlated with tumor lymphatic vessel invasion (P = 0.016) and lymph node metastasis (P = 0.003), but not with patients age, gender, tumor size, gross type, depth of invasion or degree of differentiation (P = 0.003). Undifferentiated histology (HR = 3.312; 95%CI: 1.414-7.825, P = 0.008), lymphatic vessel invasion (HR = 11.215; 95%CI: 2.780-45.978, P = 0.002) and SDF-1α expression (HR = 3.194; 95%CI: 1.313-7.296, P = 0.013) were identified to be risk factors for gastric cancer. Undifferentiated histology (HR = 3.054; 95%CI: 1.176-8.614, P = 0.039), lymphatic vessel invasion (HR = 8.651; 95%CI: 1.731-44.959, P = 0.008) and SDF-1α expression (HR = 2.219; 95%CI: 1.327-10.346, P = 0.015) were also identified to be independent risk factors for lymph node metastasis in gastric cancer patients.
CONCLUSION: SDF-1α may be an independent risk factor for lymph node metastasis in gastric cancer.
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Lang BJ, Hu YC, Chen L, Tang LH, Ma JY. Relationship between expression of stromal cell-derived factor-1α and lymph node metastasis in early gastric cancer. Shijie Huaren Xiaohua Zazhi 2015; 23:116-120. [DOI: 10.11569/wcjd.v23.i1.116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the relationship between the expression of stromal cell-derived factor-1α (SDF-1α) and the risk of lymph node metastasis in early gastric cancer (EGC).
METHODS: We examined the expression of SDF-1α in 168 archival tissue specimens of EGC by immunohistochemical method.
RESULTS: Of the included specimens, 72 (42.9%) and 96 (57.1%) were grouped into SDF-1α-positive and SDF-1α-negative groups, respectively. No significant differences existed with respect to age, gender, proportion of tumors > 20 mm in size, macroscopic type, depth of invasion or histology between the SDF-1α-positive and SDF-1α-negative groups. However, the SDF-1α-positive group was significantly correlated with lymphovascular invasion and lymph node metastasis. Univariate analysis indicated that lymphovascular invasion, undifferentiated histology and SDF-1α positivity were risk factors significantly affecting lymph node metastasis in patients with EGC. Multivariate analysis showed that lymphovascular invasion [hazard ratio (HR) = 3.753, 95% confidence interval (CI): 1.674-8.415; P = 0.001], undifferentiated histology (HR = 2.038, 95%CI: 1.100-3.775; P = 0.024) and SDF-1α positivity (HR = 3.631, 95%CI: 1.101-11.977; P = 0.034) were independent risk factors for lymph node metastasis in EGC.
CONCLUSION: Our findings suggest that SDF-1α expression is closely related to the risk of lymph node metastasis in EGC, and SDF-1α expression in tumor cells is a predictive marker of lymph node metastasis in EGC.
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Gao Y, Wang Q, Cui X, Liu Y, Zheng T, Chen C, Sun C, Huang S, Wang X, Liu Y, Jiang X, Zeng C, Quan D. Controlled release of stromal cell-derived factor-1α from silk fibroin-coated coils accelerates intra-aneurysmal organization and occlusion of neck remnant by recruiting endothelial progenitor cells. Int J Clin Exp Pathol 2014; 7:8366-8380. [PMID: 25674201 PMCID: PMC4314014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Accepted: 11/24/2014] [Indexed: 06/04/2023]
Abstract
This study is to test the efficacy of stromal cell-derived factor-1α (SDF-1α)-coated coils together with endothelial progenitor cells (EPCs) transplantation in occluding aneurysms. Bone marrow-derived EPC surface markers were analyzed using flow cytometry. The migratory function of EPCs in response to SDF-1α was evaluated using a modified Boyden chamber assay. Capillary-like tube formation was assessed using Matrigel gel. Coil morphologies before and after coating with SDF-1α were observed under a scanning electron microscope. The level of SDF-1α in supernatants was measured by ELISA. Sprague-Dawley rats were randomly allocated into five groups. Histological analysis was performed on days 14 and 28 after coil implantation. The bone marrow-EPCs could express CD133, CD34, and VEGFR-2 and form tubule-like structures in vitro. Migratory ability of EPCs in the presence of SDF-1α-coated coils was similar to that in the presence of 5 ng/ml SDF-1α gradient. Sustained release of SDF-1α was achieved using silk fibroin as a carrier. In SDF-1α-coated coils + EPCs transplantation group, a well-organized fibrous tissue bridging the orifice of aneurysms was shown on days 14 and 28. On day 28, tissue organization was greater in the SDF-1α-coated coils group than in the unmodified coils group. Immunofluorescence showed α-smooth muscle actin-positive cells in organized tissue in sacs. Combined treatment with SDF-1α-coated coils and EPCs transplantation is a safe and effective treatment for rat aneurysms. This may provide a new strategy for endovascular therapy following aneurysmal subarachnoid hemorrhage.
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Affiliation(s)
- Yuyuan Gao
- Department of Neurosurgery, Zhujiang Hospital, The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Southern Medical UniversityGuangzhou City, Guangdong Province, P.R. China
| | - Qiujing Wang
- Department of Neurosurgery, Zhujiang Hospital, The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Southern Medical UniversityGuangzhou City, Guangdong Province, P.R. China
| | - Xubo Cui
- Department of Neurosurgery, Zhujiang Hospital, The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Southern Medical UniversityGuangzhou City, Guangdong Province, P.R. China
| | - Yaqi Liu
- Department of Neurosurgery, Zhujiang Hospital, The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Southern Medical UniversityGuangzhou City, Guangdong Province, P.R. China
| | - Tao Zheng
- Department of Neurosurgery, Zhujiang Hospital, The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Southern Medical UniversityGuangzhou City, Guangdong Province, P.R. China
| | - Chengwei Chen
- Department of Neurosurgery, Zhujiang Hospital, The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Southern Medical UniversityGuangzhou City, Guangdong Province, P.R. China
| | - Chengmei Sun
- Department of Neurosurgery, Zhujiang Hospital, The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Southern Medical UniversityGuangzhou City, Guangdong Province, P.R. China
| | - Shuyun Huang
- Department of Neurosurgery, Zhujiang Hospital, The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Southern Medical UniversityGuangzhou City, Guangdong Province, P.R. China
| | - Xin Wang
- Department of Neurosurgery, Zhujiang Hospital, The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Southern Medical UniversityGuangzhou City, Guangdong Province, P.R. China
| | - Yanchao Liu
- Department of Neurosurgery, Zhujiang Hospital, The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Southern Medical UniversityGuangzhou City, Guangdong Province, P.R. China
| | - Xiaodan Jiang
- Department of Neurosurgery, Zhujiang Hospital, The National Key Clinic Specialty, The Neurosurgery Institute of Guangdong Province, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Southern Medical UniversityGuangzhou City, Guangdong Province, P.R. China
| | - Chi Zeng
- Scholl of Chemistry and Chemical Engineering, Sun Yat-Sen UniversityGuangzhou City, Guangdong Province, P.R. China
| | - Daping Quan
- Scholl of Chemistry and Chemical Engineering, Sun Yat-Sen UniversityGuangzhou City, Guangdong Province, P.R. China
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Walsh TG, Harper MT, Poole AW. SDF-1α is a novel autocrine activator of platelets operating through its receptor CXCR4. Cell Signal 2014; 27:37-46. [PMID: 25283599 PMCID: PMC4265729 DOI: 10.1016/j.cellsig.2014.09.021] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Accepted: 09/23/2014] [Indexed: 11/12/2022]
Abstract
Platelets store and secrete the chemokine stromal cell-derived factor (SDF)-1α upon platelet activation, but the ability of platelet-derived SDF-1α to signal in an autocrine/paracrine manner mediating functional platelet responses relevant to thrombosis and haemostasis is unknown. We sought to explore the role of platelet-derived SDF-1α and its receptors, CXCR4 and CXCR7 in facilitating platelet activation and determine the mechanism facilitating SDF-1α-mediated regulation of platelet function. Using human washed platelets, CXCR4 inhibition, but not CXCR7 blockade significantly abrogated collagen-mediated platelet aggregation, dense granule secretion and thromboxane (Tx) A2 production. Time-dependent release of SDF-1α from collagen-activated platelets supports a functional role for SDF-1α in this regard. Using an in vitro whole blood perfusion assay, collagen-induced thrombus formation was substantially reduced with CXCR4 inhibition. In washed platelets, recombinant SDF-1α in the range of 20–100 ng/mL− 1 could significantly enhance platelet aggregation responses to a threshold concentration of collagen. These enhancements were completely dependent on CXCR4, but not CXCR7, which triggered TxA2 production and dense granule secretion. Rises in cAMP were significantly blunted by SDF-1α, which could also enhance collagen-mediated Ca(2 +) mobilisation, both of which were mediated by CXCR4. This potentiating effect of SDF-1α primarily required TxA2 signalling acting upstream of dense granule secretion, whereas blockade of ADP signalling could only partially attenuate SDF-1α-induced platelet activation. Therefore, this study supports a potentially novel autocrine/paracrine role for platelet-derived SDF-1α during thrombosis and haemostasis, through a predominantly TxA2-dependent and ADP-independent pathway. Collagen-induced platelet aggregation, TxA2 production and dense granule secretion require CXCR4 signalling. CXCR4 regulates platelet thrombus formation. SDF-1α-induced changes in cAMP and Ca(2 +) signalling require CXCR4. SDF-1α, via CXCR4, enhances platelet activation responses to collagen, primarily through a TxA2-dependent and ADP-independent pathway.
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Affiliation(s)
- Tony G Walsh
- School of Physiology and Pharmacology, University of Bristol, Bristol, BS8 1TD, United Kingdom
| | - Matthew T Harper
- School of Physiology and Pharmacology, University of Bristol, Bristol, BS8 1TD, United Kingdom
| | - Alastair W Poole
- School of Physiology and Pharmacology, University of Bristol, Bristol, BS8 1TD, United Kingdom.
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Wang Y, Fu W, Zhang S, He X, Liu Z, Gao D, Xu T. CXCR-7 receptor promotes SDF-1α-induced migration of bone marrow mesenchymal stem cells in the transient cerebral ischemia/reperfusion rat hippocampus. Brain Res 2014; 1575:78-86. [PMID: 24924806 DOI: 10.1016/j.brainres.2014.05.035] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2014] [Revised: 05/19/2014] [Accepted: 05/22/2014] [Indexed: 12/17/2022]
Abstract
The stromal cell-derived factor 1/C-X-C chemokine receptor type 4 (SDF-1/CXCR-4) axis plays an important role during stem cell recruitment. SDF-1 can also bind the more recently described CXCR-7 receptor, but effects of SDF-1/CXCR-7 signaling on stem cell migrating to ischemic brain injury area are little known. In the present study, we investigated the effect of CXCR-7 on bone marrow mesenchymal stem cell (BMSC) migration toward SDF-1α in the cerebral ischemia/reperfusion (I/R) rat hippocampus. We cultured BMSCs from rats and characterized them using flow cytometry, immunocytochemistry, western blotting, and immunofluorescence to detect SDF-1α, CXCR-4, and CXCR-7 expression in third passage BMSCs (P3-BMSCs). We also prepared the model of transient cerebral I/R by four-vessel occlusion (4-VO), and BMSCs were transplanted into I/R rat brain via lateral ventricle (LV) injection (20μl, 1×10(6)/ml). After that, we examined the effect of BMSCs migration in the cerebral I/R rat hippocampus through Transwell chamber assay. Our results show that SDF-1α, CXCR-4, and CXCR-7 were expressed in P3-BMSCs. Moreover, SDF-1α expression was increased in I/R hippocampus. At 48h after transplant, green fluorescent BrdU-BMSCs were observed in transplant groups, but no green fluorescent BrdU-BMSCs were seen in medium group. Among BMSCs transplant groups, the number of BrdU-BMSCs positive cell was the highest in BMSC group. Treatment with AMD3100 and/or CXCR-7 neutralizing antibody decreased the number of BMSC migration. Collectively, these findings indicate that CXCR-4 and -7 receptors were co-expressed in BMSCs and synergistically promoted BMSC migration. The effect of CXCR-7 was stronger than that of CXCR-4. Moreover, BMSCs that migrated to hippocampus promoted the autocrine and paracrine signaling of SDF-1α.
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Affiliation(s)
- Yulan Wang
- Department of Human Anatomy and Neurobiology, Xuzhou Medical College, No. 209 Tong-shan Road, Jiangsu, Xuzhou 221004, China.
| | - Wei Fu
- Department of General Surgery, Affiliated Hospital of Xuzhou Medical College, Xuzhou 221004, China
| | - Shichun Zhang
- Department of Human Anatomy and Neurobiology, Xuzhou Medical College, No. 209 Tong-shan Road, Jiangsu, Xuzhou 221004, China
| | - Xiaomei He
- Department of Human Anatomy and Neurobiology, Xuzhou Medical College, No. 209 Tong-shan Road, Jiangsu, Xuzhou 221004, China
| | - Zhi'an Liu
- Department of Human Anatomy and Neurobiology, Xuzhou Medical College, No. 209 Tong-shan Road, Jiangsu, Xuzhou 221004, China
| | - Diansuai Gao
- Department of Human Anatomy and Neurobiology, Xuzhou Medical College, No. 209 Tong-shan Road, Jiangsu, Xuzhou 221004, China
| | - Tiejun Xu
- Department of Human Anatomy and Neurobiology, Xuzhou Medical College, No. 209 Tong-shan Road, Jiangsu, Xuzhou 221004, China
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